Bump io.grpc:grpc-netty-shaded in /dashboard-v4/demos/java

Bumps [io.grpc:grpc-netty-shaded](https://github.com/grpc/grpc-java) from 1.47.0 to 1.75.0.
- [Release notes](https://github.com/grpc/grpc-java/releases)
- [Commits](https://github.com/grpc/grpc-java/compare/v1.47.0...v1.75.0)

---
updated-dependencies:
- dependency-name: io.grpc:grpc-netty-shaded
  dependency-version: 1.75.0
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

dashboard-v4/demos/java/pom.xml

@@ -117,7 +117,7 @@
         <dependency>
             <groupId>io.grpc</groupId>
             <artifactId>grpc-netty-shaded</artifactId>
-            <version>1.47.0</version>
+            <version>1.75.0</version>
             <scope>runtime</scope>
         </dependency>
         <dependency>